Is he passive? Or is he enthusiatic and involved? Does he go around and observe his student's mistakes and then teach them how to fix them? Or does he let everyone figure it out through trial and error on their own? Does he show everyone the same techniques?
And in also in general, what is your instructor like overall?
I have 4 separate instructors right now.
The intro class is taught by 2 different guy (one on Monday, one on Wednesday). The regular class is taught by a 3rd guy and the sparring & Saturday classes are taught by a 4th guy.
Monday: Quiet and somewhat reserved. However, he walks around to each group and does corrections. He's also always ready to come over if you have a question. He teaches the basics & does so in "fun" ways a lot of time. So when working on full guard he'll have drills to work on different aspects. (e.g. Pull your oppenent down to you just with your legs.)
Wednesday: Fairly technical. He also walks around to each group and will stop and correct little things "Move that foot out more. Slide your hips more this way." Very encouraging and does a good job letting you know when you've got it.
Regular class: Laid back. Likes to show a lot of things from tournament settings. He'll say "Some guys like to get in this position here, but what you'll see a lot of the times is something more modified like this." He also comes around and requests to see each student do the move before moving on to the next one. He likes to joke around some as well. A few weeks back I said "Thanks for the class sir."
"You're welcome, but please don't call me sir."
"Ok, Sir, I won't. Sir."
"I can tell I'm going to like you."
Sparring and Saturday: Relaxed & deliberate. The warmups we'll do relate specifically to the technique he's teaching. Maybe it's some kind of back-step up & down the mat, and then he uses that same back-step while passing a position. He does a good job of making sure everyone is getting it, although he doesn't usually walk around much. He seems to be able to see everything no matter where he is on the matt.